Syrian helicopters dropped barrel bombs on a taxi stand in the city of Aleppo on Friday, killing at least 12 civilians, including a child, a monitoring group said.

“Twelve civilians, among them a child, were killed, and five others seriously wounded after helicopters launched two explosive-laden barrels against the Haidariyeh district,” the Syrian Observatory for Human Rights said.

There were least a dozen bloodied corpses lying on the ground. One, wrapped in a shroud, was apparently that of a child.

The journalist also saw several people on stretchers, showing burns and shrapnel wounds, and others lying in pools of blood near sandbags. It was not clear whether they were dead.

Haidariyeh is home to a popular taxi stand.

There was also a massive crater in the street left by one of the bombs.

One resident said: “I saw the bodies. They were workers, people who were simply trying to find a way to put bread on the table… You can see the human remains.”

A man who had volunteered to help rescue survivors said “taxi drivers gather here to transport workers and goods… There were no rebels here.”

Last December, President Bashar al-Assad’s regime launched a massive aerial campaign against rebel districts in the east of Syria’s second city, despite a UN Security Council resolution condemning such strikes.

In July, Human Rights Watch condemned the air force campaign, saying it had killed 1,700 people in five months.

Barrel bombs are typically constructed from large oil drums, gas cylinders or water tanks, filled with high explosives and scrap metal to enhance fragmentation.